I respectfully disagree. Based on what you've said, it sounds like you've asked your friend multiple times to use something else, and there's a chance they're trying to be respectful to you by politely declining to hear more suggestions.
I've been on both ends of this, I've been pushed to look at games I could've been interested in but just didn't feel like giving a novel back to my friend as to why I'm not going to buy it, and I've tried to push friends onto Linux and that ultimately resulted in them getting pissed off with me.
It took me a while to realize, there is no wrong operating system to use, there is no wrong social platform to use. People are willing to try new things, but at their own pace and if they can see that there's an easy transition, but it's more than that.
I used to think the more people I get onto Linux, the more I'm doing my part for the market share and in turn the software gets better for me and for them, but what I failed to realize is that I was no different to a Jehovah's Witness, and I certainly came off as annoying as them to my friends. I don't care what they use now, but if they're ever interested in help on something that I'd love for them to use, I gladly help them and answer any questions they have, and so far, that's worked better anyway.
I just fear that you're going down the same path I did. I fear your friend isn't copping out of wanting ads, Chrome, iOS, etc. They just want to avoid a confrontation with you.
